Metal sput and method of attaching the same to sheet metal containers



A. E. JESSER METAL CONTAINERS June 2, 1936.

METAL SPUT AND METHOD OF ATTACHING THE SAME TO SHEET Filed Oct. 11.,1933 2 Sheets-Sheet l all 7'!" i INVENTOR. \wypw BY ATTORNEYS.

' June 2, 1936. A. E. JIESSER 2,043,101

METAL SPUT AND METHOD OF ATTACHING THE SAME TO SHEET METAL CONTAINERSFiled Oct. 11, 1933 2 Sheets-Sheet 2 if 3g -13 1 lballlii} 5% J 2/)... V000 Z 1.5a l2 J5 J6 Q k I r? lrr 4 1Z4 f INVENTOR.

M6 BY 52 2V A TTORNEYS.

Patented June 2, 1936 METAL SPUT AND METHOD OF ATTACH- I ING THE SAME TOSHEET METAL CON- TAINERS Albert E. Jesser, Vandergrift, Pa., assignor toPittsburgh Steel Drum Company, Pittsburgh, Pa., a corporation ofPennsylvania Application October 11, 1933, Serial No. 693,089

11 Claims. (01. 29-1482) This invention relates to improvements in metalbunghole fitting, for a barrel or drum, prefersputs or similar fittings,and to. the manner of ably made from a malleable metal as by forging.applying and securing the same to sheet metal The bunghole fittingillustrated includes an ancontainers and the like. nular ring bodyportion 2, it being understood For example, in making a metal drum,barrel that my invention may be applied to similar 5 or other container,9. bung is necessary for filltypes of fittings without limitation as todimening and emptying, and accordingly a separate sion or form. Acentral bore 3 is provldedof metal sput or bunghole fitting is employed.Such tapered form for receiving and irictionally refitting is generallyof heavier metal than the taining a bung or cork, not shown.

body of the container and is therefore difiicult Extendin beyond O facedot the fitting A 10 of simple and inexpensive attachment. andpreferably forming an extension 3a of the Welding has been generallyemployed for this bore of said fitting, I provide a cencentrlc thinpurpose, but due to the relative thicknesses of annular lip ring portionthe inner face the metals, difiiculty has been encountered in of whichis prefe y tapered outwardly toward obtaining a perfect weld withoutimpairing the its terminal edge. 15

strength of the sheet metal. 5 designates an annular concentric recessin My invention has in view to provide a simple the face a of thefitting, extending laterally inand eflicient mechanical joint betweensuch a War f and pr y in P r m w hs i sput or fitting and the wall of ht t l face. A second concentric recess 6 is formed container, whereby toproducealeak-proof sealed axially 0 t fi t Op inwardly 0f the connectiontherebetween; to provide a practical ss 5 a d extending i t sa d fitt nsubfitting construction inexpensive to manufacture stantially at rig tangles t0 a d recess 5 and the and having novel inter-fitting andinterlocking face a of the fitting, the inner wall of said recessengagement with the container wall; to pro- 5 being a continuation Ofthe outer surface '1) vide a connecting joint .between said sput and ofthe lip 7 container disposed fiush with the container wall Referring owto s- 3 t0 5 inclusive, B desigto give unobstructed fluid passagetherethrough; no es a portion of the wall of a sheet metal barand toprovide a method of connecting and serel, drum or other. container towhich the fitting curing said sput and container with a minimum A is tobe appl e The initial tep in'the method number of operations. of myinvention consists in forming a fitting- The invention may be morereadily understood e e v p h in t e Sheet metal B. from the followingdescription taken in connec- Thus in F15. d 8 designate a P 0 tion withthe accompanying drawings, wherein: pu c d bending dies. As illustratedin Fig. 1 is a sectional perspective view of a sput dotted lines, theSheet B is P d over the or bunghole fitting constructed in accordancerelmded ring Portion 9 the Stationary d e 3, 35

with my invention; I where it is engaged by' the punch I0 of movableFig. 2, a. view similar to Fig, 1 showing od die 1 to remove a centraldisk stamping c.

fied construction; Continued downward movement of the die 1 40 'Figs. 3to 5 inclusive, sectional views reSpeC-o carries the sheet B over saidrounded portion 40 tively illustrating the successive steps in the 9 toupset a r g Portion 911111111911 p H method of securing the fitting ofFig. 1 t a centric with the opening formed in said sheet, single walledsheet metal container or similar Sa d p Preferably being fi a y disposedat right article; angles to the body of the sheet. I

Fig. 6, a view similar to Fig. 5, showing the The diameter of theannular lip ll thus formed 45 final step in the method of securing thefitting is substantially equal to that of the axial recess of Fig. 2; 6of the fitting A, and is designed to be entered Fig. 7, a sectionalperspective view of a r i therein in the manner of Fig. 4, the width oflip forcing member employed in connection with the and recess beingfashioned to de a $11118 fi form of Fig 2; a d When so positioned, thebody of the sheet B con- 50 Fig. 8, a sectional view showing myinvention tacts the face a of the fitting, and th 1 H employed inconnection with a double walled is spaced from the terminal wall of therecess 6 sheet metal container or the like. a A strin gasket II o otpackin such as lead Referring to the drawings, A designates genor cementmay be placed between said lip and 56 erally a metal sput or fitting, asfor example, a the terminal wall of the recess if desired.

The fitting and sheet assembled in the manner stated are next placedbetween a pair of forming dies l3 and I4 as in Fig. 4, with the fittinglip 4 positioned over the mandrel portion l5 of stationary die l4.

Downward motion of the die l3 causes the fitting lip l to be forced androlled outward in a direction parallel to the face a of said fittinginto contact with the under side of the sheet B, and overlapping thebase portion of the container lip ll. Continued closing movement of saiddie l3 efiects an off-setting of a portion l6 of the metal of the sheetB immediately over the recess 5 into the said recess, thereby displacingthe lip ll of the sheet into tight sealing engagement with the terminalwall of its recess 6, or with the contained packing 12 when employed.

The off-setting of the portion 16 of the sheet into its recess 6 isaccomplished by the pressure exerted by the dies upon the fitting lip 4,resulting in a lip-receiving depression I! being formed in the sheet B,conforming to and receiving the said lip I.

Therefore, as may be seen in Fig. 4, the final closing movement of thedies l3 and [4, provides an off-set and interlocking engagement betweenthe sput or fitting A and the sheet B of simple andefiicientconstruction, the joint thereby provided being effectivelyclinched and sealed against leakage when subjected to severe hydraulicpressures.

It will be seen that the foregoing construction provides a joint whichis disposed flush with the wall of the container or barrel, therebypreventing the trapping or clogging of its contents when emptying thesame.

While the construction and method just described may be applied tovarious shapes and designs of containers, the fitting particularlyreferred to and illustrated in Fig. 1 is essentially for a single walledcontainer, as for example, an oil drum or a metal beer barrel.

I have found, particularly in the construction and use of beer barrels,that it is desirable to provide additional reenforcing for the sput orbunghole fitting, due to the practice of employing a mechanical bungdriving machine which seals the bungs with considerable force. Repeatedapplication of such sealing force is apt to distort the metal of asingle walled drum adjacent the bunghole, the resulting indentationcausing a corresponding diminution of the gallonage or capacity of thebarrel, or possible leakage rupture.

To obviate this condition, I have provided a modified form of fitting A,illustrated in Figs. 2 and 6, similar to that of Fig. 1 and including asecond concentric thin annular lip l8 surrounding the bore 3 andextending from the face of the fitting opposite that having theprotruding lip 4.

Cooperating with said lip 18 and the main shell B is a conicalreenforcing member 19 formed of sheet metal and having a plane fiatupper flange 20 around a central contained opening 2|, said flange beingadapted to lie over and contact the face of the fitting A about the lipIS.

The fitting is generally applied as before, with the exception that theupper die I 3a is formed with an annular groove 22 for contacting andbending the lip I! over and into holding engagement with the flange 20of the member I9. As illustrated in Fig. 6, the entire bending andsecuring operation may be accomplished at the same time.

The base portion of the member I9 is preferably of such diameter as toextend annularly into close proximity with the annular hoops or ribs 23generally formed in the wall of the barrel or drum B. 6

Therefore, by spot welding the member l9 about its base to the barrel B,as at 26, I have provided a reenforcement against inward as well aslateral displacement of the fitting or metal of the drum, the downwardand inward force of a bung sealing machine being transmitted to thereenforcing hoops or ribs 23 through the member 19.

The present sput or fitting and method of applying the same may beemployed in connection with a double walled drum or container, such acontainer, for example, as that shown in my pending application, filedJuly 19, 193-3, Serial No. 681,120.

In the event of such use, as illustrated in Fig. 8, the inner wall orcontainer B" may be formed of relatively thin metal as aluminum, and theouter wall C of heavier sheet metal, spaced apart and having interveninginsulation material D therebetween. The sput or fitting A" employed 25may be formed of an aluminum forging and is altered as to dimension toreceive the smaller gauge metal of the container B".

In additionpthe outer portion of the fitting A" is threaded at 24 toreceive a nut or threaded collar 25, thereby securing the outercontainer C and fitting A" together.

I claim:

1. The herein described method of forming a connecting joint between asheet metal container and a metal fitting, consisting in forming thefitting with an annular lip extending from one face thereof and a pairof recesses in said face, one of said recesses extending axially of thefitting and the other laterally of said face; forming an opening in thewall of the sheet metal container with an extending annular lip;entering said container lip in the axial recess of the fitting; forcingthe fitting lip outwardly along and into contact with the container wallinto overlapping relation with the base portion of said container lip;offsetting a portion of said container wall into the lateral recess ofthe fitting and forcing the container lip tightly into said axialrecess; and forcing the fitting lip into said'oifset portion flush withthe container wall.

2. The herein described method of forming a connecting joint between asheet metal container and a metal fitting, consisting in forming thefitting with an annular lip extending from one face thereof and a pairof recesses in said face, one of said recesses extending laterally ofsaid face and the other axially within the fitting at ,right angles tosaid lateral recess; forming an opening in the wall of the sheet metalcontainer with an extending annular lip; entering said container lip inthe axial recess of the fitting; forcing the fitting lip outwardly alongand into contact with the container wall into overlapping relation withthe base portion of said container' lip; offsetting a portion of saidcontainer wall into the lateral recess of the fitting and forcing thecontainer lip tightly into said axial recess; and forcing the fittinglip into said ofiset portion flush with the container wall. 3. Theherein described method of forming a connecting joint between a sheetmetal container and a metal fitting, consisting in forming the fittingwith an annular lip extending from-one face thereof and a pair ofrecesses in said face, 7

one of said recesses extending axially of the fitting and the otherlaterally of said face; forming an opening in the wall of the sheetmetal container with an extending annular lip; entering said containerlip in the axial recess of the fitting; forcing the fitting lipoutwardly along and into contact with the container wall intooverlapping relation with the base portion of said container lip andsimultaneously forcing said container lip tightly into said axial recessby off-setting a portion of the container wall into the lateral recessof the fitting, and forcing the fitting lip into said offset portionflush with the container wall.

4. The combination with a sheet metal container having an opening in awall thereof and an annular lip around said opening, of a metal sputhaving a face thereof engaging the container wall, said sput having aninternal axially disposed annular recess receiving said lip, said sputalso having a laterally disposed annular recess in said face extendingoutwardly from said axial recess, an off-set portion in the containerwall entered within the lateral recess, and an extended annular lip onsaid sput entered in said container opening and disposed outwardlywithin said offset portion of the container wall at an angle to saidcontainer lip.

5. The combination with a sheet metal container having an opening in awall thereof and an annular lip around said opening, of a metal sputhaving a face thereof engaging the container wall, said sput having aninternal axially disposed annular recess receiving said lip, said sputalso having a laterally disposed annular recess in said face extendingoutwardly from said axial recess, an offset portion in the containerwall entered within the lateral recess, and an extended annular lip onsaid sput entered in said container opening and disposed outwardlywithin said offset portion flush with the container wall at an angle tosaid container lip.

6. The combination with a sheet metal oon tainer having an opening in awall thereof and an annular lip around said opening,-of a metal sputsurrounding said lip and having a face thereof engaging the containerwall, said sput having a laterally disposed annular recess in said faceand an internal axially extending annular recess disposed at rightangles to said lateral recess, said axial recess receiving saidcontainer lip, an offset portion in the container wall entered withinthe lateral recess, and an extended annular lip on said sput entered inthe container opening and disposed outwardly within said offset portionof the container wall at right angles to said container lip.

7. The combination with a sheet metal container having an opening in awall thereof and an annular lip around said opening, of a metalsputsurrounding said lip and having a face thereof engaging the containerwall, said sput having a laterally disposed annular recess in said faceand an internal axially extendingannular recess communicating with anddisposed at right angles to said lateral recess, said axial recessreceiving said container lip, an offset portion in the container wallentered within the lateral recess,

and an extended annular lip on said sput entered" in the containeropening and disposed outwardly within said offset portion at rightangles to said container lip flush with the container wall.

8. The combination with a sheet metal container having an opening in awall thereof and an annular lip around said opening, of a metal sputentered within and extending outwardly beyond said opening, said sputhaving interlocking engagement with the container lip, a reenforclngmember extending from the outer face of the sput and secured to thecontainer wall at a point remote from said sput, and means on said sputfor frictionally securing the reenforcing member thereto.

9. The combination with a sheet metal container having an opening in awall thereof and an annular lip around said opening, of a metal sputentered within and extending outwardly beyond said opening, said sputhaving interlocking engagement with the container lip, a conicalreenforcing member extending downwardly and outwardly from the outerface of the sput to the container wall, said member being secured to thecontainer at a point remote from said sput, and an extended lip on saidsput for frictionally securing the reenforcing member thereto.

10. A metal sput having a body portion formed with a flat face having apair of internally formed annular recesses, one of said recessesextending axially within the body and the other recess disposedlaterally within said face, andan annular lip extending outwardly beyondsaid body face for cooperation with the said recesses as and for thepurpose described.

11. A one-piece metal sput having a body portion formed with a flat facehaving a pair of internally formed communicating annular recesses, oneof said recesses extending axially within the body and the other recessdisposed laterally within said face, and an annular lip extendingoutwardly beyond said body face for cooperation with the said recessesas and for the purpose described.

ALBERT E. JESSER.

